Carbon dioxide fixation method using condensation polymerization, polymer material prepared thereby, method for recovering carbon from said polymer material, and graphite generated by said carbon recovery method

Abstract

This invention relates to a method of fixing carbon dioxide by condensation polymerization in an acidic aqueous medium, thereby increasing fixation efficiency and remarkably reducing the volume of generated material compared to conventional carbon dioxide fixation methods; a polymer material prepared by the method; and a method of recovering carbon therefrom. According to the current invention, the method of fixing carbon dioxide is characterized by introducing carbon dioxide pressurized to a pressure higher than atmospheric pressure into a reactor containing a acidic aqueous medium, so that carbonic acid resulting from dissolving carbon dioxide is made into a polymer material by condensation polymerization, thereby fixing carbon dioxide, and heating the polymer material so as to recover carbon.

Description

CROSS REFERENCE TO RELATED APPLICATIONS AND CLAIM OF PRIORITY[0001]This patent application is a National Phase application under 35 U.S.C. §371 of International Application No. PCT / KR2012 / 010417, filed 4 Dec. 2012, which claims priority to Korean Patent Application Nos. 10-2011-0135234 filed 15 Dec. 2011, and 10-2012-0068934 filed 27 Jun. 2012, entire contents of which are incorporated herein by reference.TECHNICAL FIELD[0002]The present invention relates to a method of fixing carbon dioxide, a polymer material prepared thereby and a method of recovering carbon from the polymer material, and more particularly, to a method of fixing carbon dioxide, wherein carbon dioxide may be more efficiently and cheaply fixed by condensation polymerization in an acidic aqueous medium, compared to conventional carbon dioxide fixation methods; a polymer material prepared by the method; and a method of recovering carbon from the polymer material so as to enable cyclic utilization of carbon, exploitin...

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Benefits of technology

[0007]A first object of the present invention is to provide a method of fixing carbon dioxide, which enables the fixation efficiency of carbon dioxide to increase and the volume of a fixed material to be minimized.

[0024]According to the present invention, carbon dioxide can be made into a polymer material by merely increasing the pressure of carbon dioxide at 100° C. or less, thus fixing carbon dioxide at much lower cost while having a lower influence on nature, compared to conventional carbon dioxide fixation methods for storing liquefied carbon dioxide in the seabed or underground.

[0025]Also, according to the present invention, the polymer compound of carbon dioxide fixed using condensation polymerization shows the tendency of eliminating oxygen, and thereby oxygen can be removed with thermal activation, and carbon can be recycled in the form of graphite, thus achieving efficient fixation of carbon dioxide and a carbon cycle. Accordingly, carbon is combusted to thus obtain higher quality energy, and carbon dioxide generated in this procedure is pressurized and thus concentrated, solidified by condensation polymerization, and then recycled into carbon using lower temperature energy obtained by other methods such as wind power or solar light, ultimately constructing a cyclic utilization system of resources able to solve global warming problems due to carbon dioxide and also able to prevent exhaustion of carbon resources.

Problems solved by technology

Fossil fuel such as oil or coal is an energy source essential to mankind, but generates a large amount of carbon dioxide (CO2) during the use thereof, undesirably causing global warming and serious climate change.

However, these conventional carbon dioxide fixation methods are problematic because the fixation efficiency of carbon dioxide is low, and the large volume of the material produced in this procedure needs a large storage space, or because high cost is required to perform fixation and storage of carbon dioxide.

Furthermore, it is difficult to accomplish cyclic utilization of resources including fixation of carbon dioxide and recycling of carbon from fixed carbon dioxide.

Such methods are not regarded as a fundamental solution of carbon dioxide problems.

However, this method suffers because limitations are imposed on materials able to fix carbon dioxide and carbon resources of fixed carbon dioxide cannot be reused.

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